Executive Summary
Summary | |
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Title | krb5 security and bugfix update |
Informations | |||
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Name | RHSA-2008:0164 | First vendor Publication | 2008-03-18 |
Vendor | RedHat | Last vendor Modification | 2008-03-18 |
Severity (Vendor) | Critical | Revision | 01 |
Security-Database Scoring CVSS v3
Cvss vector : N/A | |||
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Overall CVSS Score | NA | ||
Base Score | NA | Environmental Score | NA |
impact SubScore | NA | Temporal Score | NA |
Exploitabality Sub Score | NA | ||
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : (AV:N/AC:L/Au:N/C:C/I:C/A:C) | |||
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Cvss Base Score | 10 | Attack Range | Network |
Cvss Impact Score | 10 | Attack Complexity | Low |
Cvss Expoit Score | 10 | Authentication | None Required |
Calculate full CVSS 2.0 Vectors scores |
Detail
Problem Description: Updated krb5 packages that resolve several issues and fix multiple bugs are now available for Red Hat Enterprise Linux 5. This update has been rated as having critical security impact by the Red Hat Security Response Team. 2. Relevant releases/architectures: Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64 RHEL Desktop Workstation (v. 5 client) - i386, x86_64 Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64 3. Description: Kerberos is a network authentication system which allows clients and servers to authenticate to each other through use of symmetric encryption and a trusted third party, the KDC. A flaw was found in the way the MIT Kerberos Authentication Service and Key Distribution Center server (krb5kdc) handled Kerberos v4 protocol packets. An unauthenticated remote attacker could use this flaw to crash the krb5kdc daemon, disclose portions of its memory, or possibly execute arbitrary code using malformed or truncated Kerberos v4 protocol requests. (CVE-2008-0062, CVE-2008-0063) This issue only affected krb5kdc with Kerberos v4 protocol compatibility enabled, which is the default setting on Red Hat Enterprise Linux 4. Kerberos v4 protocol support can be disabled by adding "v4_mode=none" (without the quotes) to the "[kdcdefaults]" section of /var/kerberos/krb5kdc/kdc.conf. Jeff Altman of Secure Endpoints discovered a flaw in the RPC library as used by MIT Kerberos kadmind server. An unauthenticated remote attacker could use this flaw to crash kadmind or possibly execute arbitrary code. This issue only affected systems with certain resource limits configured and did not affect systems using default resource limits used by Red Hat Enterprise Linux 5. (CVE-2008-0947) Red Hat would like to thank MIT for reporting these issues. Multiple memory management flaws were discovered in the GSSAPI library used by MIT Kerberos. These flaws could possibly result in use of already freed memory or an attempt to free already freed memory blocks (double-free flaw), possibly causing a crash or arbitrary code execution. (CVE-2007-5901, CVE-2007-5971) In addition to the security issues resolved above, the following bugs were also fixed: * delegated krb5 credentials were not properly stored when SPNEGO was the underlying mechanism during GSSAPI authentication. Consequently, applications attempting to copy delegated Kerberos 5 credentials into a credential cache received an "Invalid credential was supplied" message rather than a copy of the delegated credentials. With this update, SPNEGO credentials can be properly searched, allowing applications to copy delegated credentials as expected. * applications can initiate context acceptance (via gss_accept_sec_context) without passing a ret_flags value that would indicate that credentials were delegated. A delegated credential handle should have been returned in such instances. This updated package adds a temp_ret_flag that stores the credential status in the event no other ret_flags value is passed by an application calling gss_accept_sec_context. * kpasswd did not fallback to TCP on receipt of certain errors, or when a packet was too big for UDP. This update corrects this. * when the libkrb5 password-routine generated a set-password or change-password request, incorrect sequence numbers were generated for all requests subsequent to the first request. This caused password change requests to fail if the primary server was unavailable. This updated package corrects this by saving the sequence number value after the AP-REQ data is built and restoring this value before the request is generated. * when a user's password expired, kinit would not prompt that user to change the password, instead simply informing the user their password had expired. This update corrects this behavior: kinit now prompts for a new password to be set when a password has expired. All krb5 users are advised to upgrade to these updated packages, which contain backported fixes to address these vulnerabilities and fix these bugs. 4. Solution: Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/FAQ_58_10188 5. Bugs fixed (http://bugzilla.redhat.com/): 415321 - CVE-2007-5901 krb5: use-after-free in gssapi lib 415351 - CVE-2007-5971 krb5: double free in gssapi lib 432620 - CVE-2008-0062 krb5: uninitialized pointer use in krb5kdc 432621 - CVE-2008-0063 krb5: possible leak of sensitive data from krb5kdc using krb4 request 433596 - CVE-2008-0947 krb5: file descriptor array overflow in RPC library 436460 - gss_krb5_copy_ccache can't find delegated Kerberos creds when using SPNEGO 436465 - gss_init_sec_context() mechglue wrapper doesn't handle ret_flags right 436467 - kpasswd does not fallback to tcp 436468 - krb5 password changing uses incorrect sequence numbers for every server but the first 436470 - kinit does not automatically start a password change when password is expired |
Original Source
Url : https://rhn.redhat.com/errata/RHSA-2008-0164.html |
CAPEC : Common Attack Pattern Enumeration & Classification
Id | Name |
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CAPEC-26 | Leveraging Race Conditions |
CAPEC-29 | Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions |
CAPEC-172 | Time and State Attacks |
CWE : Common Weakness Enumeration
% | Id | Name |
---|---|---|
50 % | CWE-399 | Resource Management Errors |
25 % | CWE-665 | Improper Initialization |
25 % | CWE-119 | Failure to Constrain Operations within the Bounds of a Memory Buffer |
OVAL Definitions
Definition Id: oval:org.mitre.oval:def:10296 | |||
Oval ID: | oval:org.mitre.oval:def:10296 | ||
Title: | Double free vulnerability in the gss_krb5int_make_seal_token_v3 function in lib/gssapi/krb5/k5sealv3.c in MIT Kerberos 5 (krb5) has unknown impact and attack vectors. | ||
Description: | Double free vulnerability in the gss_krb5int_make_seal_token_v3 function in lib/gssapi/krb5/k5sealv3.c in MIT Kerberos 5 (krb5) has unknown impact and attack vectors. | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2007-5971 | Version: | 5 |
Platform(s): | Red Hat Enterprise Linux 4 CentOS Linux 4 Oracle Linux 4 Red Hat Enterprise Linux 5 CentOS Linux 5 Oracle Linux 5 | Product(s): | |
Definition Synopsis: | |||
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Definition Id: oval:org.mitre.oval:def:10984 | |||
Oval ID: | oval:org.mitre.oval:def:10984 | ||
Title: | Buffer overflow in the RPC library used by libgssrpc and kadmind in MIT Kerberos 5 (krb5) 1.4 through 1.6.3 allows remote attackers to execute arbitrary code by triggering a large number of open file descriptors. | ||
Description: | Buffer overflow in the RPC library used by libgssrpc and kadmind in MIT Kerberos 5 (krb5) 1.4 through 1.6.3 allows remote attackers to execute arbitrary code by triggering a large number of open file descriptors. | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2008-0947 | Version: | 5 |
Platform(s): | Red Hat Enterprise Linux 5 CentOS Linux 5 Oracle Linux 5 | Product(s): | |
Definition Synopsis: | |||
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Definition Id: oval:org.mitre.oval:def:11451 | |||
Oval ID: | oval:org.mitre.oval:def:11451 | ||
Title: | Use-after-free vulnerability in the gss_indicate_mechs function in lib/gssapi/mechglue/g_initialize.c in MIT Kerberos 5 (krb5) has unknown impact and attack vectors. NOTE: this might be the result of a typo in the source code. | ||
Description: | Use-after-free vulnerability in the gss_indicate_mechs function in lib/gssapi/mechglue/g_initialize.c in MIT Kerberos 5 (krb5) has unknown impact and attack vectors. NOTE: this might be the result of a typo in the source code. | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2007-5901 | Version: | 5 |
Platform(s): | Red Hat Enterprise Linux 5 CentOS Linux 5 Oracle Linux 5 | Product(s): | |
Definition Synopsis: | |||
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Definition Id: oval:org.mitre.oval:def:17145 | |||
Oval ID: | oval:org.mitre.oval:def:17145 | ||
Title: | USN-587-1 -- krb5 vulnerabilities | ||
Description: | It was discovered that krb5 did not correctly handle certain krb4 requests. | ||
Family: | unix | Class: | patch |
Reference(s): | USN-587-1 CVE-2008-0062 CVE-2008-0063 CVE-2008-0947 | Version: | 7 |
Platform(s): | Ubuntu 6.06 Ubuntu 6.10 Ubuntu 7.04 Ubuntu 7.10 | Product(s): | krb5 |
Definition Synopsis: | |||
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Definition Id: oval:org.mitre.oval:def:20288 | |||
Oval ID: | oval:org.mitre.oval:def:20288 | ||
Title: | DSA-1524-1 krb5 - multiple vulnerabilities | ||
Description: | Several remote vulnerabilities have been discovered in the kdc component of the krb5, a system for authenticating users and services on a network. | ||
Family: | unix | Class: | patch |
Reference(s): | DSA-1524-1 CVE-2008-0062 CVE-2008-0063 CVE-2008-0947 | Version: | 5 |
Platform(s): | Debian GNU/Linux 4.0 | Product(s): | krb5 |
Definition Synopsis: | |||
Definition Id: oval:org.mitre.oval:def:22707 | |||
Oval ID: | oval:org.mitre.oval:def:22707 | ||
Title: | ELSA-2008:0164: krb5 security and bugfix update (Critical) | ||
Description: | Buffer overflow in the RPC library used by libgssrpc and kadmind in MIT Kerberos 5 (krb5) 1.4 through 1.6.3 allows remote attackers to execute arbitrary code by triggering a large number of open file descriptors. | ||
Family: | unix | Class: | patch |
Reference(s): | ELSA-2008:0164-01 CVE-2007-5901 CVE-2007-5971 CVE-2008-0062 CVE-2008-0063 CVE-2008-0947 | Version: | 25 |
Platform(s): | Oracle Linux 5 | Product(s): | krb5 |
Definition Synopsis: | |||
Definition Id: oval:org.mitre.oval:def:8094 | |||
Oval ID: | oval:org.mitre.oval:def:8094 | ||
Title: | DSA-1524 krb5 -- several vulnerabilities | ||
Description: | Several remote vulnerabilities have been discovered in the kdc component of the krb5, a system for authenticating users and services on a network. The Common Vulnerabilities and Exposures project identifies the following problems: An unauthenticated remote attacker may cause a krb4-enabled KDC to crash, expose information, or execute arbitrary code. Successful exploitation of this vulnerability could compromise the Kerberos key database and host security on the KDC host. An unauthenticated remote attacker may cause a krb4-enabled KDC to expose information. It is theoretically possible for the exposed information to include secret key data on some platforms. An unauthenticated remote attacker can cause memory corruption in the kadmind process, which is likely to cause kadmind to crash, resulting in a denial of service. It is at least theoretically possible for such corruption to result in database corruption or arbitrary code execution, though we have no such exploit and are not aware of any such exploits in use in the wild. In versions of MIT Kerberos shipped by Debian, this bug can only be triggered in configurations that allow large numbers of open file descriptors in a process. | ||
Family: | unix | Class: | patch |
Reference(s): | DSA-1524 CVE-2008-0062 CVE-2008-0063 CVE-2008-0947 | Version: | 3 |
Platform(s): | Debian GNU/Linux 4.0 Debian GNU/Linux 3.1 | Product(s): | krb5 |
Definition Synopsis: | |||
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Definition Id: oval:org.mitre.oval:def:8916 | |||
Oval ID: | oval:org.mitre.oval:def:8916 | ||
Title: | The Kerberos 4 support in KDC in MIT Kerberos 5 (krb5kdc) does not properly clear the unused portion of a buffer when generating an error message, which might allow remote attackers to obtain sensitive information, aka "Uninitialized stack values." | ||
Description: | The Kerberos 4 support in KDC in MIT Kerberos 5 (krb5kdc) does not properly clear the unused portion of a buffer when generating an error message, which might allow remote attackers to obtain sensitive information, aka "Uninitialized stack values." | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2008-0063 | Version: | 5 |
Platform(s): | Red Hat Enterprise Linux 3 CentOS Linux 3 Red Hat Enterprise Linux 4 CentOS Linux 4 Oracle Linux 4 Red Hat Enterprise Linux 5 CentOS Linux 5 Oracle Linux 5 | Product(s): | |
Definition Synopsis: | |||
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Definition Id: oval:org.mitre.oval:def:9496 | |||
Oval ID: | oval:org.mitre.oval:def:9496 | ||
Title: | KDC in MIT Kerberos 5 (krb5kdc) does not set a global variable for some krb4 message types, which allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via crafted messages that trigger a NULL pointer dereference or double-free. | ||
Description: | KDC in MIT Kerberos 5 (krb5kdc) does not set a global variable for some krb4 message types, which allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via crafted messages that trigger a NULL pointer dereference or double-free. | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2008-0062 | Version: | 5 |
Platform(s): | Red Hat Enterprise Linux 3 CentOS Linux 3 Red Hat Enterprise Linux 4 CentOS Linux 4 Oracle Linux 4 Red Hat Enterprise Linux 5 CentOS Linux 5 Oracle Linux 5 | Product(s): | |
Definition Synopsis: | |||
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CPE : Common Platform Enumeration
OpenVAS Exploits
Date | Description |
---|---|
2010-05-28 | Name : Ubuntu Update for krb5 vulnerabilities USN-940-1 File : nvt/gb_ubuntu_USN_940_1.nasl |
2010-04-09 | Name : Ubuntu Update for krb5 vulnerabilities USN-924-1 File : nvt/gb_ubuntu_USN_924_1.nasl |
2009-11-17 | Name : Mac OS X Version File : nvt/macosx_version.nasl |
2009-04-09 | Name : Mandriva Update for krb5 MDVSA-2008:070 (krb5) File : nvt/gb_mandriva_MDVSA_2008_070.nasl |
2009-04-09 | Name : Mandriva Update for krb5 MDVSA-2008:069 (krb5) File : nvt/gb_mandriva_MDVSA_2008_069.nasl |
2009-03-23 | Name : Ubuntu Update for krb5 vulnerabilities USN-587-1 File : nvt/gb_ubuntu_USN_587_1.nasl |
2009-03-06 | Name : RedHat Update for krb5 RHSA-2008:0164-01 File : nvt/gb_RHSA-2008_0164-01_krb5.nasl |
2009-03-06 | Name : RedHat Update for krb5 RHSA-2008:0180-01 File : nvt/gb_RHSA-2008_0180-01_krb5.nasl |
2009-03-06 | Name : RedHat Update for krb5 RHSA-2008:0181-01 File : nvt/gb_RHSA-2008_0181-01_krb5.nasl |
2009-02-27 | Name : CentOS Update for krb5-devel CESA-2008:0180 centos4 i386 File : nvt/gb_CESA-2008_0180_krb5-devel_centos4_i386.nasl |
2009-02-27 | Name : CentOS Update for krb5-devel CESA-2008:0181 centos3 x86_64 File : nvt/gb_CESA-2008_0181_krb5-devel_centos3_x86_64.nasl |
2009-02-27 | Name : CentOS Update for krb5-devel CESA-2008:0181 centos3 i386 File : nvt/gb_CESA-2008_0181_krb5-devel_centos3_i386.nasl |
2009-02-27 | Name : CentOS Update for krb5 CESA-2008:0181-01 centos2 i386 File : nvt/gb_CESA-2008_0181-01_krb5_centos2_i386.nasl |
2009-02-27 | Name : CentOS Update for krb5-devel CESA-2008:0180 centos4 x86_64 File : nvt/gb_CESA-2008_0180_krb5-devel_centos4_x86_64.nasl |
2009-02-16 | Name : Fedora Update for krb5 FEDORA-2008-2647 File : nvt/gb_fedora_2008_2647_krb5_fc8.nasl |
2009-02-16 | Name : Fedora Update for krb5 FEDORA-2008-2637 File : nvt/gb_fedora_2008_2637_krb5_fc7.nasl |
2009-01-23 | Name : SuSE Update for krb5 SUSE-SA:2008:016 File : nvt/gb_suse_2008_016.nasl |
2008-09-24 | Name : Gentoo Security Advisory GLSA 200803-31 (mit-krb5) File : nvt/glsa_200803_31.nasl |
2008-06-17 | Name : Kerberos < 1.6.4 vulnerability File : nvt/kerberos_CB-A08-0044.nasl |
2008-03-19 | Name : Debian Security Advisory DSA 1524-1 (krb5) File : nvt/deb_1524_1.nasl |
Open Source Vulnerability Database (OSVDB)
Id | Description |
---|---|
43346 | MIT Kerberos 5 lib/gssapi/mechglue/g_initialize.c gss_indicate_mechs Function... |
43345 | MIT Kerberos 5 (krb5) lib/gssapi/krb5/k5sealv3.c gss_krb5int_make_seal_token_... |
43343 | MIT Kerberos 5 (krb5) libgssrpc / kadmind RPC Library File Descriptor Handlin... |
43342 | MIT Kerberos 5 KDC (krb5kdc) Error Response Information Disclosure |
43341 | MIT Kerberos 5 KDC (krb5kdc) Arbitrary Memory Disclosure |
Nessus® Vulnerability Scanner
Date | Description |
---|---|
2013-07-12 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2008-0164.nasl - Type : ACT_GATHER_INFO |
2013-07-12 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2008-0180.nasl - Type : ACT_GATHER_INFO |
2013-07-12 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2008-0181.nasl - Type : ACT_GATHER_INFO |
2013-03-09 | Name : The remote Ubuntu host is missing one or more security-related patches. File : ubuntu_USN-924-1.nasl - Type : ACT_GATHER_INFO |
2013-01-24 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2008-0182.nasl - Type : ACT_GATHER_INFO |
2012-08-01 | Name : The remote Scientific Linux host is missing one or more security updates. File : sl_20080318_krb5_on_SL3_x.nasl - Type : ACT_GATHER_INFO |
2010-05-20 | Name : The remote Ubuntu host is missing one or more security-related patches. File : ubuntu_USN-940-1.nasl - Type : ACT_GATHER_INFO |
2010-01-06 | Name : The remote CentOS host is missing one or more security updates. File : centos_RHSA-2008-0164.nasl - Type : ACT_GATHER_INFO |
2009-07-27 | Name : The remote VMware ESXi / ESX host is missing one or more security-related pat... File : vmware_VMSA-2008-0009.nasl - Type : ACT_GATHER_INFO |
2009-04-23 | Name : The remote Mandriva Linux host is missing one or more security updates. File : mandriva_MDVSA-2008-069.nasl - Type : ACT_GATHER_INFO |
2009-04-23 | Name : The remote Mandriva Linux host is missing one or more security updates. File : mandriva_MDVSA-2008-070.nasl - Type : ACT_GATHER_INFO |
2008-03-26 | Name : The remote Fedora host is missing a security update. File : fedora_2008-2637.nasl - Type : ACT_GATHER_INFO |
2008-03-26 | Name : The remote Fedora host is missing a security update. File : fedora_2008-2647.nasl - Type : ACT_GATHER_INFO |
2008-03-26 | Name : The remote Gentoo host is missing one or more security-related patches. File : gentoo_GLSA-200803-31.nasl - Type : ACT_GATHER_INFO |
2008-03-21 | Name : The remote CentOS host is missing one or more security updates. File : centos_RHSA-2008-0180.nasl - Type : ACT_GATHER_INFO |
2008-03-21 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-1524.nasl - Type : ACT_GATHER_INFO |
2008-03-19 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2008-0181.nasl - Type : ACT_GATHER_INFO |
2008-03-19 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2008-0180.nasl - Type : ACT_GATHER_INFO |
2008-03-19 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2008-0164.nasl - Type : ACT_GATHER_INFO |
2008-03-19 | Name : The remote openSUSE host is missing a security update. File : suse_krb5-5081.nasl - Type : ACT_GATHER_INFO |
2008-03-19 | Name : The remote SuSE 10 host is missing a security-related patch. File : suse_krb5-5082.nasl - Type : ACT_GATHER_INFO |
2008-03-19 | Name : The remote Ubuntu host is missing one or more security-related patches. File : ubuntu_USN-587-1.nasl - Type : ACT_GATHER_INFO |
2008-03-19 | Name : The remote host is missing a Mac OS X update that fixes various security issues. File : macosx_SecUpd2008-002.nasl - Type : ACT_GATHER_INFO |
2008-03-19 | Name : The remote CentOS host is missing one or more security updates. File : centos_RHSA-2008-0181.nasl - Type : ACT_GATHER_INFO |
2008-01-16 | Name : The remote openSUSE host is missing a security update. File : suse_krb5-4851.nasl - Type : ACT_GATHER_INFO |
2008-01-16 | Name : The remote SuSE 10 host is missing a security-related patch. File : suse_krb5-4852.nasl - Type : ACT_GATHER_INFO |
Alert History
Date | Informations |
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2014-02-17 11:51:29 |
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